Previous Next ASP.NET application and Session Time Out Redirection

Question

I have a application where I am trying to redirect on session time out so therefore in my master page I am checking if session variable is null for the redirection but the problem is that I have other pages(derived) from masterpage and on Page_Load of derived pages i am referencing some session variables there also and I've observed that PAGE_LOAD event of derived pages(content) fires first and master page PAGE_LOAD fires later so the error is popping "Object reference not set".

By the way I am writing following code on LOGIN_BUTTON_PRESSED EVENT.

FormsAuthenticationTicket ticket - new FormsAuthenticationTicket(1, userName, DateTime.Now, DataTime.Now.AddMinutes(20), true, myRoles, FormsAuthentication.FormsCookiePath);

Session["uid"] = userName.Text;  
Session["ufullname"] = ufname;  

string hashCookies = FormsAuthentication.Encrypt(ticket);  

HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, hashCookies);    

Response.Cookies.Add(cookie);  

Response.Redirect("~/Main.aspx");

Please suggest a solution to overcome this problem with example.

Answer 1

One option is to move the code in your master page Page_Load event, to the Page_Init event:

protected void Page_Init( object sender, EventArgs e )
{
    //Your code goes here
}

See ASP.NET Page Life Cycle Overview